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Initial commit of 1.11 source as released by PC Engines
Original source https://www.pcengines.ch/file/wbios111s.zip
This commit is contained in:
Steve Howes
@@ -0,0 +1,266 @@
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;
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; BIOS equates
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;
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; (C)1997-2001 Pascal Dornier / PC Engines; All rights reserved.
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; This file is licensed pursuant to the COMMON PUBLIC LICENSE 0.5.
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;
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;
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; System board I/O ports
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;
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dma0 equ 00h ;Primary 8237 DMA controller
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pic0 equ 20h ;primary 8259 interrupt controller
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timer equ 40h ;8254 timer
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#if ! def port61
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port61 equ 61h ;miscellaneous control
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#endif
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kb_dat equ 60h ;keyboard data port
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kb_stat equ 64h ;keyboard status / command port
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cm_idx equ 70h ;CMOS index port
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cm_dat equ 71h ;CMOS data port
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post equ 80h ;POST code port
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fd_page equ 81h ;DMA page register 1 (floppy)
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port92 equ 92h ;Fast A20 gate / reset
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pic1 equ 0a0h ;secondary 8259 interrupt controller
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dma1 equ 0c0h ;Secondary 8237 DMA controller
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iowait equ 0ebh ;I/O wait register
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npx equ 0f0h ;x87 coprocessor
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hdc equ 01f0h ;primary hard disk
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hdc2 equ 0170h ;secondary hard disk
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hdc_dat equ 0 ;HD data (16 or 32 bit)
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hdc_err equ 1 ;HD error (read only)
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hdc_cnt equ 2 ;HD sector count
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hdc_sec equ 3 ;HD sector
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hdc_cyl equ 4 ;HD cylinder low
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hdc_cyh equ 5 ;HD cylinder high
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hdc_drv equ 6 ;HD device / head
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hdc_cmd equ 7 ;HD command (write only)
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hdc_stat equ 7 ;HD status (read only)
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hdc_stat2 equ 03f6h-01f0h ;HD alternate status
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hdc_ctrl equ 03f6h-01f0h ;HD reset, interrupt enable
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crtc equ 03b4h ;CRTC I/O port (monochrome)
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crtc_cga equ 03d4h ;CRTC I/O port (color)
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fdc equ 03f0h ;primary floppy controller
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fdc_ctrl equ fdc+2 ;control register (drive select, motor)
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fdc_stat equ fdc+4 ;FDC status
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fdc_data equ fdc+5 ;FDC data
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fdc_rate equ fdc+7 ;disk rate
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fdc_chg equ fdc+7 ;disk change status (bit 7)
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picedge0 equ 04d0h ;primary interrupts edge/level mode
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picedge1 equ 04d1h ;secondary interrupts edge/level mode
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pci_ad equ 0cf8h ;PCI address register (32 bit)
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pci_adl equ low(pci_ad)
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pci_dat equ 0cfch ;PCI data register (32 bit)
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;This is hardwired for $xxfc in
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;several places, look before you
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;change
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pci_datl equ low(pci_dat)
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;
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; Interrupt vectors
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;
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vec00 equ 0
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vec08 equ 08h*4 ;low hardware interrupts
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vec10 equ 10h*4 ;BIOS interrupts
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vec13 equ 13h*4 ;disk interrupt
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vec40 equ 40h*4 ;vector to floppy interrupt
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vec41 equ 41h*4 ;vector to drive 80 parameters
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vec46 equ 46h*4 ;vector to drive 81 parameters
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vec70 equ 70h*4 ;high hardware interrupts
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;
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; BIOS data area
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;
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; Most BIOSes access this as segment 0040, but I prefer 0000.
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; The only place where this can cause problems is the keyboard
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; buffer, which is offset to segment 0040.
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;
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m_fdbase equ 0078h ;INT1E = disk base
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; we use IRQ area instead of extended BIOS data area for the
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; PS/2 mouse variables. This can be moved anywhere.
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#if def PS2MOUSE
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m_msbase equ 0200h ;base address
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m_msvec equ m_msbase ;pointer to call-back routine
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m_msflag equ m_msbase+4 ;mouse flags
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;bit 7 = 1: command pending
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;bit 6 = 1: FE request resend
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;bit 5 = 1: FA command acknowledge
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;bit 4 = 1: FC error condition
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;bit 3 = 1: call back installed
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;bit 2 = 1: initialized
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;bit 1..0 : buffer index
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m_msbuf equ m_msbase+5 ;mouse buffer (3 bytes - 1)
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m_msend equ m_msbase+7
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#endif
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m_rsio equ 0400h ;serial I/O ports
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m_lpio equ 0408h ;parallel I/O ports
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m_devflg equ 0410h ;device flags (word)
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m_lomem equ 0413h ;low memory size (word) in 1KB units
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m_kbf equ 0417h ;keyboard flag
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m_kbf1 equ 0418h ;keyboard flag 2
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m_kbnum equ 0419h ;Alt-xxx numeric entry
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m_kbhead equ 041ah ;^buffer head
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m_kbtail equ 041ch ;^buffer tail
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m_kbbuf equ 041eh ;keyboard buffer
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m_kbbuf9 equ 043eh ;end of keyboard buffer
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m_fdrecal equ 043eh ;floppy recal status
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m_fdmot equ 043fh ;floppy motor status
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m_fdcnt equ 0440h ;floppy motor timer
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m_fdstat equ 0441h ;last floppy status
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m_fdfile equ 0442h ;floppy status / command file
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m_vmode equ 0449h ;video mode
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m_vcol equ 044ah ;video columns (word)
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m_vpgsz equ 044ch ;video page size (word)
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m_vpage equ 044eh ;video page start address (word)
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m_vcolrow equ 0450h ;video column, row (8 pages)
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m_vcursor equ 0460h ;video cursor end, start line (word)
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m_vpgno equ 0462h ;video page number
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m_vcrt equ 0463h ;video CRTC I/O (word)
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m_vmsel equ 0465h ;video mode select register
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;used for key buffer, option CONSOLE
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m_vpal equ 0466h ;video CGA palette register
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;used for serial redirect flag,
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;option CONSOLE.
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m_ioofs equ 0467h ;option ROM offset
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m_ioseg equ 0469h ;option ROM segment
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m_timer equ 046ch ;timer ticks since midnight (4 bytes)
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m_timofl equ 0470h ;1 equ timer overflow
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m_brkflg equ 0471h ;keyboard break flag
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m_rstflg equ 0472h ;reset flag, $1234 if Ctrl-Alt-Del
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m_hdstat equ 0474h ;HDD status last command
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m_hdcnt equ 0475h ;number of HDD drives
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m_lptime equ 0478h ;parallel port time-out (4 bytes)
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m_rstime equ 047ch ;serial port time-out (4 bytes)
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m_kbstart equ 0480h ;^buffer start
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m_kbend equ 0482h ;^buffer end
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m_vrow equ 0484h ;video row count - 1
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m_hdst equ 048ch ;HDD status register
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m_hderr equ 048dh ;HDD error register
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m_hdflag equ 048eh ;HDD interrupt flag
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;m_fdinfo equ 048fh ;floppy info
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m_console equ 048fh ;serial port console flag
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m_fdmed0 equ 0490h ;floppy A: media status
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;m_fdmed1 equ 0491h ;floppy B: media status
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m_conkey equ 0492h ;console key buffer
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;m_fdmed0a equ 0492h ;floppy A: initial media status
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;m_fdmed1a equ 0493h ;floppy B: initial media status
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m_fdtrk0 equ 0494h ;floppy A: current track
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;m_fdtrk1 equ 0495h ;floppy B: current track
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m_kbf3 equ 0496h ;keyboard status
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m_kbf2 equ 0497h ;keyboard status
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m_prtsc equ 0500h ;print screen status
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;
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; Temporary data area - cleared before boot
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;
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tmp_diag equ 04b0h ;diagnostic hex dump display (16)
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tmp_losz equ 0504h ;base top of memory (32 bit)
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tmp_hisz equ 0508h ;extended top of memory (32 bit)
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tmp_kbd equ 0510h ;keyboard response, AA = ok (8)
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tmp_kbc equ 0511h ;keyboard controller, FF = not present
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tmp_npx equ 0514h ;control word, for init
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tmp_kbfail equ 0518h ;1 if keyboard failure
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tmp_rtc equ 0519h ;1 if RTC battery failure or bad time /
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;date
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tmp_ss equ 051ah ;RTC second for run check
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tmp_mm equ 051bh ;RTC minute for run check
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tmp_timer equ 051ch ;Timer (16 bit) for timer run check
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tmp_tim equ 051eh ;1 if timer / RTC update failure
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tmp_pci equ 0520h ;workspace for PCI BIOS
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tmp_stack equ 1000h ;POST stack
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tmp_buf equ 1000h ;temporary buffer, used for HDD init
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tmp_buf2 equ 1200h ;extra buffer, define TEMPSIZE if using
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;
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; RTC / CMOS
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;
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cm_nmi equ 80h ;NMI disable index
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cm_ss equ 0 ;RTC seconds
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cm_ssa equ 1 ;RTC seconds alarm
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cm_mm equ 2 ;RTC minutes
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cm_mma equ 3 ;RTC minutes alarm
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cm_hh equ 4 ;RTC hours
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cm_hha equ 5 ;RTC hours alarm
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cm_day equ 6 ;RTC day of week (cleared, not used)
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cm_dd equ 7 ;RTC day
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cm_mo equ 8 ;RTC month
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cm_yy equ 9 ;RTC year
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cm_a equ 0ah ;RTC status, divider
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cm_b equ 0bh ;RTC mode, interrupt control
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cm_c equ 0ch ;RTC interrupt status
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cm_d equ 0dh ;RTC battery status
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cm_dia equ 0eh ;CMOS diagnostic byte (power fail flag)
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cm_shut equ 0fh ;CMOS shutdown register
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cm_test equ 2fh ;CMOS test register (legacy: checksum)
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cm_exl equ 30h ;CMOS extended memory size, low
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cm_exh equ 31h ;CMOS extended memory size, high
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cm_cent equ 32h ;CMOS century
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#if def CM_LEGACY
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cm_meml equ 15h ;CMOS base memory, low
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cm_memh equ 16h ;CMOS base memory, high
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cm_exl2 equ 17h ;CMOS extended memory size, low
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cm_exh2 equ 18h ;CMOS extended memory size, high
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#endif
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;
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; Miscellaneous
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;
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eoi equ 20h ;PIC: End of Interrupt
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bofs equ 0400h ;BIOS segment offset
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;
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; TTY equates
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;
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bell equ 7 ;bell
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bs equ 8 ;backspace
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lf equ 10 ;line feed
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cr equ 13 ;carriage return
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vidseg equ 0b000h ;video segment for monochrome
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vid_fill equ 0720h ;fill pattern, space
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;
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; PUSHA stack frame
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;
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_cs equ 22 ;return address (for debug)
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_ip equ 20
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_ds equ 18 ;pushed before
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_es equ 16 ;pushed before
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_ax equ 14
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_al equ _ax
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_ah equ _ax+1
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_bx equ 8
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_bl equ _bx
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_bh equ _bx+1
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_cx equ 12
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_cl equ _cx
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_ch equ _cx+1
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_dx equ 10
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_dl equ _dx
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_dh equ _dx+1
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_si equ 2
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_di equ 0
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_bp equ 4
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_flags equ 6
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;
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; RET_SP - subroutine call without stack
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;
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ret_sp macro
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mov sp,offset >m1 ;point to return address
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jmp #1 ;jump to subroutine
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m1: dw $+2 ;return address
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#em
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;
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; SAFEORG - set code pointer with range check
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;
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safeorg macro
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##if $ GT #1
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error Code overrun - reduce STARTOFS or move include files !
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##endif
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db (#1 - $) dup 0ffh ;fill empty space
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#em
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